bison guide hcf
DESCRIPTION
Bison manual exampleTRANSCRIPT
PRECAST CONCRETE FLOORING
Uniclass L7315
CI/SfB
August 2007
(52.3) X
LEADING THE PRECAST INDUSTRY SINCE 1919
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This Bison precast concrete flooring document is a comprehensive product and
technical guide designed for Structural Engineers, Civil Engineers, Specifiers
and Contractors.
It provides a range of products and solutions to choose from and is supported by
technical details, specifications and design guidelines/considerations for Part A,
Part E and Part L.
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
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CONTENTS
INTRODuCTION PAGES 0 - 7
COMMERCIAL/INDuSTRIAL PRODuCTS PAGES 08 - 23
HOuSING PRODuCTS SINGLE OCCuPANCY PAGES 24 - 29
HOuSING PRODuCTS MuLTIPLE OCCuPANCY PAGES 30 - 39
COMPOSITE STEEL bEAM DESIGN PAGES 40 - 41
buILDING REGuLATIONS PAGES 42 - 57
SPECIFICATIONS & HEALTH AND SAFETY PAGES 58 - 61
RELATED PRODuCTS PAGES 62 - 63
bISON ONLINE PAGES 64
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RESOuRCE AND CAPACITYThe largest production capacity across four manufacturing
plants throughout the UK, with Certificates of Assessed
Capability, awarded by the British Standards Institution.
INNOVATIONOver the last seven years, Bison has invested £50 million
to ensure that our customers continue to benefit from
innovative approaches to production, installation and service.
We can boast a number of unique developments such as
mechanically inserted Lifting Hooks and the Trailasafe® fall
arrest system.
bISON LEADING THE PRECAST INDuSTRY SINCE 1919
Excellent customer service, investment in research and development and an
unrivalled understanding of market needs are just some of the reasons we
have been ahead of the field for so long.
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SuSTAINAbILITYWith Bison products, you can be certain that all materials
have been produced in conditions designed to have as little
impact on the environment as possible. Swadlincote is the
most environmentally friendly factory of its kind in
the world.
CuSTOMER DRIVENOur investment is focused on meeting and exceeding
customer expectations. Bison customers in all the sectors
we serve know that they can rely on us for outstanding
technical support, reliability and the highest quality product.
CuSTOMER SERVICEThe Bison service team provide comprehensive support,
from estimating to production and a contract team who
install the products on site. Wherever you are in the UK,
Bison’s nationwide coverage ensures that support is
never far away.
DESIGN SuPPORT Bison’s in-house
team represents
the very best
in the industry
and is on hand
to give design
advice for any
project, large
or small. They can help identify the optimal solution for
your project, whether this means using one of our many
precision-made steel moulds, or taking the bespoke
approach with a custom-made casting.
Designs are produced in our centralised production
planning department and downloaded to the factory
machines by wireless link.
The Bison Precast Floor Designer software can assist with
the design of many Bison products including Hollow Core
slab units, Composite Hollowcore slab units and Solid
Composite slab units.
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bISON CONCRETE FLOOR TYPES
bISON HOLLOw CORE & SOLID FLOORS Widely used in masonry, steel and concrete structures for
domestic, commercial and industrial buildings. The most
economic flooring solution for the widest variety of situations,
providing the maximum benefits of speed of construction.
bISON HOLLOw COMPOSITE FLOORS A combination of the Bison Hollow Core Slab with a structural
concrete topping. This type of floor gives the benefit of an
increased structural performance with an enhanced lateral
load distribution where necessary for heavy point loads.
The floor may be designed in the unpropped or partially
propped condition to suit particular requirements.
Bison Concrete Floors are prestressed precast concrete slabs used in all building types
Bison Concrete Floors are manufactured using a long line casting technique
with automatic casting equipment which places high strength, low water/
cement ratio concrete under a high degree of vibration and compaction.
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bISON CONCRETE FLOOR TYPES
bISON SOLID COMPOSITE FLOORS Combines the advantages of a precast, prestressed
element acting compositely with an in-situ concrete
structural topping to form a solid slab. The prestressed
element, whilst eliminating the need for conventional
shuttering, provides a structural performance far superior
to normally reinforced concrete.
LIFTING HOOKS All Bison Precast Concrete Floors are available with
inserted lifting hooks. For more information see section
‘Related Products’, pages 62 & 63.
INSuLATED HOLLOw CORE GROuND FLOORS The system consists of expanded polystyrene (EPS) bonded
to the soffit of Hollow Core units and formed to provide
special end and side bearing support where required.
THE bISON SOuND SLAb The Bison Sound Slab has been specially developed to
provide an economic and structurally efficient means of
satisfying the requirements of Part E Sound Regulations.
FLOOR HEATING AND COOLING SYSTEMSAs the conservation of energy continues to be a major
issue surrounding the environment, Bison has entered into
a strategic partnership with velta UK. With over 35 years’
experience, velta have been responsible for some of the
industry’s most important innovations in floor heating
and cooling systems and now offers the widest range of
solutions specifically designed to meet the requirements of
each individual project. Bison and velta have joined forces
to provide an innovative, sustainable and cost effective floor
heating and cooling system which is precast in to Bison
flooring products providing off site manufacturing benefits.
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Bison has a prolonged proven track record within commercial / industrial markets and produces a range of products and solutions for many different floor applications.
This encompasses shops, shopping precincts, multi-storey car parks, office
developments, factories and warehouses.
However, the types of constructional components used in these buildings are
also often specified for large public developments such as schools
and hospitals.
MARKET APPLICATIONS
COMMERCIAL/INDuSTRIAL
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HOuSINGSINGLE OCCuPANCY
HOuSINGMuLTIPLE OCCuPANCY
In traditional single-occupancy housing, individual Bison
products can solve particular problems for the designer, arising
from site conditions, constructional constraints or the Building
Regulations, including Part E, Part A and Part L.
Similarly for multiple-occupancy housing, individual
Bison products can solve particular problems.
Bison has a sustained track record and reputation within
the multiple occupancy market. A range of floor solutions
and products provide the architect and the structural
engineer with flexibility in design as well as satisfying the
Building Regulations, particularly with reference to sound
attenuations (Part E), Thermal Performance (Part L) and
Structural Robustness (Part A).
MARKET APPLICATIONS HOuSING
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COMMERCIAL / INDuSTRIAL PRODuCTS
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HOLLOw CORE FLOORS THE bENEFITS
STrucTural EfficiEncy
A Hollow Core slab offers the ideal structural section by
reducing deadweight while providing the maximum structural
efficiency within the slab depth.
flExiBiliTy of DESign approacH
Precast floors are available with a variety of factory-formed
notches, slots and reinforcement arrangements which offer
various design approaches.
ExTra long SpanS
Factory made prestressed units offer the design benefit of
long span units for given depths. This avoids the need for
intermediate supports and provides an economically light
solution throughout the entire structure. The Bison long span
450mm-deep unit can span in excess of 16 metres.
facTory proDucED To rigorouS QualiTy STanDarDS
Because precast floors are factory produced, they are
manufactured in an environment which is more readily
controlled than a building site. Quality control systems are
properly implemented and are independently examined on a
regular basis under the British Standards Institution Quality
Assurance Scheme, BS EN ISO 9001 approved.
firE rESiSTancE
Standard precast floors can be supplied with a fire resistance
of up to two hours. Periods in excess of this can be provided
with modified sections if required.
finiSHED SoffiTS
Precast floors are manufactured on high quality steel beds
and, in appropriate cases, are suitable for direct decoration.
Exposed soffits can easily be accommodated.
DESIGN
MANuFACTuRING
CONSTRuCTION
SHElf anglE BEaring
Slab ends can be notched during manufacture to facilitate a
bearing within the depth of a main steel support.
This minimises storey height, causing substantial cost
benefits from reduced cladding, lower internal fittings and
other related peripherals.
DiapHragm acTion
Precast floor slabs are structurally grouted to provide a
floor with full diaphragm action, as required in most
multi–storey frameworks.
prEformED SiTE SErvicES
Precast floors can be provided with factory formed service
holes, thus avoiding laborious setting out and shuttering
on site.
minimum in-SiTu concrETE
With a precast floor, a lot of the work is done off site. This
eliminates what can be complex, time-consuming and
weather-affected site work.
SpEED of ErEcTion
Time-consuming activities such as propping, shuttering
and concrete-pouring are virtually eliminated.
immEDiaTE unproppED Working plaTform
Once a precast floor is erected, it is immediately available
as a working platform. In comparison, steel deck systems
can present problems in achieving level surfaces while
concrete is being poured, and in enabling access while in
the propped condition.
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SECTION 01
HOLLOw CORE FLOORS CASE STuDIES
The office block shown is the British Gas offices in
Solihull, West Midlands. This is a typical commercial
application where the structural form consists of a
steel frame with 7.5 x 8.7m bays and 200mm precast
Hollow Core units spanning 7.5m. A total of 9100m2
of precast units were used and 40m3 of precast stair.
Multi storey car park in Nuneaton where 10,000m2 of
150mm deep Hollow Core floor units and 67m3 of precast
stair units was used to provide excellent durability and
performance in a busy, robust car park environment.
The IKEA outlet in Manchester is constructed using
a steel frame with precast unit floors. Over 40,000m2
of 200mm deep Hollow Core precast floor units were
used in the construction. The grid reflected the use
of car park, retail and offices on different floors.
Drake Circus Shopping Centre located in Plymouth
used 19,000m2 across a combination of Hollow Core
floor profiles from 200mm up to 450mm deep.
Pictured is a hospital in Exeter constructed using
a steel frame structure with 200mm and 300mm
deep Hollow Core units used to span up to 9m. This
provided flexibility in span lengths and optimised
design for the applied loads over 4,250m2 floor area
throughout.
Millennium Stadium in Cardiff used over 48,000m2 of
precast Hollow Core floor units and over 380 precast
stair units.
COMMERCIAL buILDINGS AND CAR PARKS
RETAIL DEVELOPMENTS
HOSPITAL & STADIA DEVELOPMENTS
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COMMERCIAL / INDuSTRIAL PRODuCTS
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HOLLOw CORE FLOORS uNIT PROFILES
1200mm Nominal Width
75mm unit profile
150mm Sound Slab unit profile
100mm unit profile
150mm unit profile
200mm unit profile
450mm unit profile
400mm unit profile
350mm unit profile
300mm unit profile
260mm unit profile
250mm unit profile
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HOLLOw CORE FLOORS LOAD/SPAN TAbLE
Largely because of fast on-site construction, Bison Hollow Core Floors are one of the most economic flooring solutions
for the widest variety of situations including masonry, steel and concrete structures for retail, commercial and
industrial buildings.
The table is given as a guide only. When using maximum spans, consideration must be given to the effect of camber and
deflection on partitions or finishes. Further advice is available on request. * 35mm screed required for 2 hour
fire resistance.
overallstructuraldepth mm
Spans indicated below allow for characteristic service load (live load)plus self weight plus 1.5 kN/m2 for finishes
Characteristic service loads kN/m2
0.75 1.5 2.0 2.5 3.0 4.0 5.0 7.5 10..0 15.0
Effective span in metres
100* 5 5 5 5 4.8 4.5 4.2 3.7 3.3 2.8
150* 7.5 7.5 7.5 7.5 7.3 6.8 6.4 5.6 5 3.2
200 10 10 9.7 9.4 9.1 8.5 8 7.1 6.4 5.5
250 12.3 11.5 11.1 10.7 10.4 9.7 9.2 8.1 7.4 6.3
300 15 14.9 14.4 13.9 13.5 12.8 12.1 10.9 10 8.7
350 17.4 16.5 15.9 15.5 15 14.2 13.6 12.5 11.2 9.8
400 18.5 17.6 17 16.6 16.1 15.3 14.6 13.2 12.1 10.6
450 19.9 19 18.5 18 17.5 16.7 15.9 14.5 13.4 11.7
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SECTION 01
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HOLLOw CORE FLOORS bEARING DETAILS
25 mm clearance is required to allow unit to be dropped
into position past the flange of the supporting U.B.
25 mm
clearance
Structural concrete infill
Nominal bearing 75
Minimum bearing 50
Projection of angle
beyond extremity of
flange 50 mm.
Greater where U.C.
sections are used.
Refer to Bison for
assistance.
Finishes
bEARING ON SHELF ANGLES
COMMERCIAL / INDuSTRIAL PRODuCTS
bEARING ON MASONRY
HOLLOw CORE FLOORS bEARING DETAILS
Finishes
Nominal bearing
t / 2 - 10 mm
Wall thickness
t 190t
Where required by Building Regulations for
sound insulation.
Continuous wet mortar by
builder to take up camber
Finishes
SIDE bEARING
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SECTION 01
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COMMERCIAL / INDuSTRIAL PRODuCTS
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NARROw wALL bEARING
HOLLOw CORE FLOORS bEARING DETAILS
NARROw bEARING ON STEELwORK
Finishes
Nominal bearing
t / 2 - 10 mm
Wall thickness
t 150
(Min. 140 mm) t
Tie reinforcement at
400 c/c in joints and
troughs provided in
1200 wide units
Structural concrete infill
Finishes
Nominal bearingt / 2 - 10 mm(Min. 65 mm)
Wall thicknesst < 190(Min. 140 mm)
t
Tie reinforcement at
400 c/c in joints and
troughs provided in
1200 wide units
Structural concrete infill
(NB. In order to satisfy the tolerances in this situation, this
detail is only recommended where a full bearing is available
at the other end of the slab)
Structural concrete infill
Structural concrete infill
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SECTION 01
END SLOTS IN uNITS
TRIMMING OPENINGS
HOLLOw CORE FLOORS bEARING DETAILS
Slots may be provided in slab ends for the purpose of tying into
the structure for nominal continuity.
The recommendations for bearings of precast units are set out in Clause 5.2.3 of B.S. 8110:1997. These vary according to the type of floor
construction and the type of support material and building tolerances. In general nominal bearings of 100 mm on masonry or 75 mm on
steelwork are recommended but may be reduced dependent upon circumstances and subject to the above clause.
M.S.Trimmer. Fire protection, where necessary by
General Contractor.
Finishes
Structural concrete infillFinishes
COMMERCIAL / INDuSTRIAL PRODuCTS
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HOLLOw COMPOSITE FLOORS uNIT PROFILES
1200mm Nominal Width
200 to 225mm overall composite depth
comprising 150mm unit with 50 or 75mm structural topping
250 to 275mm overall composite depth
comprising 200mm unit with 50 or 75mm structural topping
300 to 325mm overall composite depth
comprising 250mm unit with 50 or 75mm structural topping
375mm overall composite depth
comprising 300mm unit with 75mm structural topping
335mm overall composite depth
comprising 260mm unit with 75mm structural topping
525mm overall composite depth
comprising 450mm unit with 75mm composite material
475mm overall composite depth
comprising 400mm unit with 75mm structural topping
425mm overall composite depth
comprising 350mm unit with 75mm structural topping
HOLLOw COMPOSITE FLOORS LOAD/SPAN TAbLE
A Bison Hollow Composite Floor is a Bison Hollow Core Slab with a structural concrete topping. This combination delivers
increased structural performance overall, with an improved lateral load distribution where necessary for heavy point loads.
The floor may be designed in the unpropped or partially propped condition to suit particular requirements. It is particularly
suitable for industrial buildings, high buildings, car parks or other structures where additional longitudinal and transverse
tying is required.
The above data is based upon 50 or 75mm structural topping of C30 concrete which should be regarded as a minimum.
Other topping depths may be recommended in some circumstances. Design data for alternative combinations are available
from Bison design offices. In relation to the overall structural concept of the building it is also important also to consider
topping reinforcement, daywork and movement joints.
overallstructuraldepth mm
Spans indicated below allow for characteristic service load (live load)plus self weight plus 1.5 kN/m2 for finishes
Characteristic service loads kN/m2
0.75 1.5 2.0 2.5 3.0 4.0 5.0 10..0 15.0
Effective span in metres
200 8.25 8.25 8.1 7.9 7.7 7.4 7.1 5.8 4.9
250 10.4 9.9 9.7 9.4 9.2 8.8 8.4 7 6
300 11.7 11.2 10.9 10.6 10.4 9.9 9.5 7.8 6.8
375 14.5 14 13.7 13.5 13.2 12.7 12.3 10.7 8.8
425 16 15.5 15.2 14.9 14.6 14.1 13.7 11.9 10
475 17.1 16.5 16.2 15.9 15.6 15.1 14.6 12.7 10.7
525 18.5 17.9 17.6 17.3 17 16.4 15.9 13.9 11.7
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SECTION 01
COMMERCIAL / INDuSTRIAL PRODuCTS
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SOLID COMPOSITE FLOORS uNIT PROFILES
Bison Solid Composite Floors consist of a precast, prestressed element acting compositely with an in-situ concrete
structural topping to form a solid slab. This combination of elements delivers the benefits of both, such as a structural
performance far superior to normally-reinforced concrete, reduced construction depths, no shuttering, minimal propping,
built-in fire resistance, fast erection, and increased flexibility of architectural and engineering design, such as the scope to
incorporate all the details normally associated with in-situ design, such as the tying in of balconies, trimming of openings,
maximum load distribution and minimum structural depth.
1200mm Nominal Width
75mm unit with 50mm structural topping
75mm unit with 75mm structural topping
75mm unit with 100mm structural topping
75mm unit with 125mm structural topping
100mm unit with 50mm structural topping
100mm unit with 100mm structural topping
100mm unit with 150mm structural topping
100mm unit with 200mm structural topping
SOLID COMPOSITE FLOORS LOAD/SPAN TAbLE
A Bison Hollow Composite Floor is a Bison Hollow Core Slab with a structural concrete topping. This combination delivers
increased structural performance overall, with an improved lateral load distribution where necessary for heavy point loads.
The floor may be designed in the unpropped or partially propped condition to suit particular requirements. It is particularly
suitable for industrial buildings, high buildings, car parks or other structures where additional longitudinal and transverse
tying is required.
fire resistance*
unitdepth
overallstructuraldepth mm
Self Wtkn / m2
proppedor
unpropped
Spans indicated below allow for characteristic service load (live load)plus self weight plus 1.5 kN / m2 for finishes
Characteristic service loads kN / m2
0.75 1.5 2.0 2.5 3.0 4.0 5.0 10.0 15.0
Effective span in metres
1 hour
75
125 2.95
P
6.70 6.25 6.00 5.70 5.50 5.15 4.87 3.90 3.80
150 3.54 7.50 7.00 6.80 6.50 6.35 5.95 5.60 4.56 3.92
175 4.12 8.32 7.78 7.52 7.25 7.02 6.62 6.29 5.12 4.05
200 4.71 8.90 8.40 8.12 7.85 7.62 7.20 6.85 4.98 3.96
1 hour
75
125 2.95
U/P
3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.60 3.10
150 3.54 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.50
175 4.12 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.65
200 4.71 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.75 3.68
1 hour100
150 3.54
P
7.80 7.27 7.00 6.75 6.50 6.10 6.77 4.55 3.85
200 4.71 9.10 8.64 8.22 8.08 7.82 7.33 7.05 5.80 4.50
250 5.89 10.18 9.85 9.15 9.00 8.90 8.45 8.08 6.12 4.50
300 7.07 10.66 9.58 9.45 9.15 8.80 8.15 7.60 5.80 4.40
1 hour
100
150 3.54
U/P
5.00 5.00 5.00 5.00 5.00 5.00 5.00 4.50 3.88
200 4.71 5.00 5.00 5.00 5.00 5.00 5.00 5.00 4.96 4.50
250 5.89 5.00 5.00 5.00 5.00 5.00 5.00 5.00 4.80 4.50
300 7.07 4.95 4.92 4.90 4.88 4.85 4.80 4.71 4.60 4.40
2 hour
100
150 3.54
P
7.26 6.80 6.66 6.46 6.23 5.85 5.50 4.30 3.60
200 4.71 8.57 8.25 8.05 7.83 7.10 6.85 6.60 5.62 4.25
250 5.89 9.00 8.80 8.65 8.50 8.35 8.10 7.80 5.75 4.35
300 7.07 10.20 9.00 8.90 8.70 8.30 7.30 7.20 5.50 4.20
2 hour
100
150 3.54
U/P
5.00 5.00 5.00 5.00 5.00 5.00 5.00 4.30 3.62
200 4.71 5.00 5.00 5.00 5.00 5.00 5.00 5.00 4.60 4.20
250 5.89 5.00 5.00 5.00 4.95 4.90 4.85 4.80 4.55 4.35
300 7.07 4.65 4.65 4.65 4.65 4.60 4.55 4.55 4.40 4.02
*Enhancement of the stated fire period may be achieved by applied soffit finishes.
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21
SECTION 01
COMMERCIAL / INDuSTRIAL PRODuCTS
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bEARINGS ON SHELF ANGLES
SOLID COMPOSITE FLOORS bEARING DETAILS
Minimum 25 mm cover to top of steel beam flange
Minimum 50 mm clearance Nominal 50 mm bearing
SIMPLE bEARINGS ON TOP FLANGE OF STEELwORK
SLAb COMPOSITE wITH SuPPORTING bEAM
40 mm
Min. bearing
Nominal support reinforcement and/or daywork joints
determined by general layout and site operation.
40 mm
Min. bearing
Flange reinforcement and shear studs as
required by steelwork design
40 mm
Min. bearing
SOLID COMPOSITE FLOORS bEARING DETAILS
CANTILEVER CONSTRuCTION
IN-SITu CONSTRuCTION SIDE
IN-SITu CONSTRuCTION CENTRED
In-situ structural topping on precast element
Precast balcony
element
For IsoPro balcony requirements refer to Bison for assistance.
Nominal 50 mm bearing for
precast elements
Nominal 50 mm bearing for
precast elements
Beam depths and widths to suit specific requirements
Solid composite floors may be placed on in-situ beam
downstands or supported on shutters before pouring
site concrete
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23
SECTION 01
HOuSING PRODuCTS SINGLE OCCuPANCY
24
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HOLLOw CORE FLOORS THE bENEFITS
SounD rESiSTancE
The single most common complaint in relation to housing
is noise nuisance. Timber floors have little sound resistance
and most people will be familiar with the problems and the
inconvenience of sound transmission, particularly from upstairs
to downstairs. Precast concrete floors provide an extremely
efficient sound barrier between separate living areas.
mainTEnancE
Precast concrete is an inert material. It does not shrink
and warp like timber and does not produce the cracking of
plasterwork and other finishes which result in an ongoing
and costly maintenance problem. Concrete is not subject to
damage from rot or insect attack.
SQuEaky floorS
Another problem associated with the shrinkage of timber
materials is the squeaking between boards and joists when
walked upon. This is extremely irritating and very expensive to
rectify. This problem does not exist with a concrete floor.
firE
Adequate fire resistance is an important design feature of any
modern building. It has long been recognised that floors between
flats in multi-occupancy housing should have a high level of fire
resistance. Consequently, these are almost always constructed
in concrete in order to satisfy the Building Regulations. It seems
reasonable that a similar level of protection should be afforded to
those living in houses. Concrete is, of course, a non-combustible
material and it also acts as a solid barrier which will contain not
only the fire but the smoke, which is the primary cause of most
fatalities in fire accidents.
facTory proDucED To rigorouS QualiTy STanDarDS
Because precast floors are factory produced, they are
manufactured in an environment which is more readily
controlled than a building site. Quality control systems in
Bison factories are properly implemented and are independently
examined on a regular basis under The British Standards
Institution Quality Management System defined in BS EN ISO 9001.
DESign flExiBiliTy
Unlike timber, a precast concrete floor provides a structural
platform which gives the house designer greater freedom in
supporting upper floor wall partitions to virtually any layout.
Furthermore with a concrete upper floor the partitions can be
built in blockwork with its greater sound resistance, instead of
timber stud.
SpEED of ErEcTion
Typically a single precast floor slab is up to 10 square metres
in area and can be laid in minutes. Dependent upon site
conditions and house sizes, the floors to several houses can
normally be completed in one day.
prEformED SErvicE proviSion
Precast concrete floors can be provided with factory-formed
service holes to accommodate all the necessary service
routes with ease.
uSER bENEFITS
CONSTRuCTION bENEFITS
STrucTural EfficiEncy
A Hollow Core slab offers the ideal structural section by
reducing the deadweight whilst providing the maximum
structural efficiency with the minimum slab depth. This offers
the design benefit of longer spans, thus reducing the lengths
of internal loadbearing walls and foundations.
SiTE SafETy
Once a precast concrete floor is erected it is immediately
available as a working platform. Combined with Trailasafe®
synthetic mesh for trailer deck fall arrest, and the Bison Air
Mat for roll-off fall protection, this creates the safest possible
environment for site workers.
HOuSING PRODuCTS SINGLE OCCuPANCY
HOLLOw CORE FLOORS CASE STuDIES
TERRACED SINGLE OCCuPANCY HOuSING DEVELOPMENTS
DETACHED HOuSING DEVELOPMENTS
LARGE ESTATE HOuSING DEVELOPMENTS
Pictured is part of a large housing development based in
London. Over 578m2 of 150mm Hollow Core floor units were
used throughout for 1st and 2nd floor applications across
varying design type houses, typically from town type, 2 floor
houses, to traditional 1st floor houses.
Hollow Core floors have been installed by many
housebuilders, both large and small, for terraced
developments.
Pictured is a detached housing development based in
Warwick. The development was a mix of three, four and
five bedroom detached houses, where 250m2 of 150mm
Hollow Core units were used throughout the plot for all
first floor applications.
Further detached developments using Hollow Core floors
have been constructed across the country, from Sterling in
Scotland to Portsmouth in England.
Pictured is an estate type housing, consisting of 8 bedrooms,
24 rooms and 3 outbuildings based in Oxshott.
496m2 of Hollow Core floor units were used throughout
the house.
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25
SECTION 02
HOuSING PRODuCTS SINGLE OCCuPANCY
26
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HOLLOw CORE FLOORSGROuND/uPPER FLOOR SLAb PROFILES
CONSTRuCTION DETAILS
1200mm Nominal Width
150mm unit profile
200mm unit profile
The most suitable and widely used precast unit for single occupancy housing is a 1200mm wide Hollow Core slab with a
depth of either 150 or 200mm.
TYPICAL HOuSE LAYOuTS
Structural steel supports
by others
Slab span direction Load bearing walls
1200 mm Wide Units
Non-Load bearing walls
HOLLOw CORE FLOORSALTERNATIVE bATTEN ARRANGEMENTS TO SOFFITS
To view load span tables please go to page 13
Short firing is not recommended. Various site-drilled anchors are available and, used in accordance
with the manufacturers instructions, are a simple and economic fixing method.
Battens Plasterboard
Battens and counterbattensService routes in ceiling void Plasterboard
A SuSTAINAbLE CHOICE...
The use of Bison Hollow Core flooring can significantly cut the carbon dioxide emissions of a project by up to one
fifth; a CO2 reduction and material saving of 23% can be achieved in the construction of an office block.*
*based on a 2600m2 office block development
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27
SECTION 02
HOuSING PRODuCTS SINGLE OCCuPANCY
28
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TYPICAL DuAL bEARING
Alternative
services route
Alternative
services route
190 mm
Block Wall
SIDE bEARING
Where required by Building Regulations for
sound insulation.
Continuous wet mortar by
builder to take up camber
Finishes
HOLLOw CORE FLOORSbEARING DETAILS
TRIMMING OPENINGSTYPICAL SINGLE bEARING
M.S.Trimmer. Fire protection, where necessary
by General Contractor.
100 mm
Block Wall 190 mm
Block Wall
INSuLATED HOLLOw CORE FLOORSGROuND FLOOR
INSuLATED HOLLOw CORE FLOORSbEARING DETAILS
DuAL bEARING EXTERNAL wALL bEARING
1200 mm Nominal Width
150 mm unit profile
200 mm unit profile
Finishes
Finishes
Foundation
190 mm
Sleeper Wall
Support Castellations
262 mm
or 312 mm Expanded Polystyrene
(EPS) bonded to soffit
INSuLATED HOLLOw CORE uNIT DETAILS
Support CastellationsHollow Core Unit Expanded Polystyrene
(EPS) bonded to soffit
150 mm
or 200 mm
The Building Regulations Part L1A, L2A 2006 ‘Conservation of fuel and power’ require that a building is airtight and
pressure testing for this is covered by regulation 54. The regulations no longer allow the elemental method and a building
needs to be considered as a whole to satisfy the requirements of the regulations. Bison can provide an insulated slab to
give a thermal ‘U’ value of 0.22W/m2 for the floor and greater if required.
Finishes
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SECTION 02
HOuSING PRODuCTS MuLTIPLE OCCuPANCY
30
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HOLLOw CORE FLOORS THE bENEFITS
SpEED of ErEcTion
Time consuming activities such as propping, shuttering and
concrete pouring are virtually eliminated.
lifTing HookS
Bison can supply Hollow Core units with cast-in lifting hooks
that speed up the installation and bring associated Health &
Safety benefits.
immEDiaTE unproppED Working plaTform
Propping is generally not required with Hollow Core floors.
Once a precast floor is erected it is immediately available
as a working platform. In comparison, steel deck systems
can present problems in achieving level surfaces while
concrete is poured, and in enabling access while in the
propped condition.
minimum in-SiTu concrETE
With a precast floor a lot of the work is done off-site. This
eliminates on-site work that can be complex, time-consuming
and weather affected.
ExTra long SpanS
Factory-made prestressed units offer the design advantage
of long span units for given depths. This can avoid the need
for intermediate supports.
DiapHragm acTion
Precast floor slabs, when structurally grouted, provide a
floor with full diaphragm action to the building. A structural
concrete topping is not required.
flExiBiliTy of DESign approacH
Precast floors can provide the technical solution for the
requirements of Part A of the Building Regulations 2004 for
Disproportionate Collapse.
compoSiTE STEEl BEam DESign
Composite Steel Beam Design incorporating either Hollow
Core or solid slabs provides a structural and cost efficient
solution for steel frames. It reduces total tonnage of steel
beams by up to 40% and also reduces the number of
components to be erected.
SounD rEQuirEmEnTS BuilDing
rEgulaTionS parT E
In new-build attached dwellings a developer may choose
between Pre-Completion Testing (PCT.) or, if available, a
Robust Detail (RD). Bison Concrete Products have developed
a series of solutions to cover the use of precast concrete
units in association with masonry buildings and steel and
concrete frames. Solutions have been developed and testing
is in the process of being completed prior to an application
for Robust Detail status.
prEformED SiTE SErvicES
Precast floors can be provided with factory formed service
holes, thus avoiding laborious setting out and shuttering
on-site.
STrucTural EfficiEncy
A Hollow Core slab offers the ideal structural section by
reducing the deadweight whilst providing the maximum
structural efficiency within the slab depth.
facTory-proDucED To rigorouS
QualiTy STanDarDS
Because precast floors are factory-produced, they are
manufactured in an environment which is more controlled
than a building site. Quality control systems are properly
implemented and are independently examined on a regular
basis, under the British Standards Institution Quality
Management Scheme defined in BS EN ISO 9001:2000.
HOLLOw CORE FLOORS TRACK RECORD
MuLTI-STOREY HOuSING
MuLTI-STOREY HOuSING
MuLTI-STOREY RESIDENTIAL DEVELOPMENTS
The three block housing development in Windsor consisted
of 1st, 2nd, 3rd and roof with the other two blocks being 1st,
2nd and roof. All three blocks used 200mm deep Hollow Core
sound slab flooring with 3897m2 used throughout the scheme
and 30m3 of concrete precast stairs.
The housing development in Worcester, which used 1,700m2
of 200mm deep Hollow Core sound slab flooring and 10m3
of precast concrete stairs. This included one three storey
block and one 4 storey block.
This multi-storey residential development used precast
Hollow Core floors within a steel frame structure. The
development is in Walsall, Birmingham, and used 1500m2 of
200mm deep Hollow Core sound slab flooring, plus 29m3 of
precast stair units.
A flat, uninterrupted soffit was achieved with the Hollow Core
units, spanning 6.1m between downstand beams, which were
at separating wall positions.
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SECTION 03
HOuSING PRODuCTS MuLTIPLE OCCuPANCY
32
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HOLLOw CORE FLOORS uNIT PROFILES
1200 mm Nominal Width
150mm unit profile
150mm Sound Slab unit profile
200mm unit profile
300mm unit profile
260mm unit profile
250mm unit profile
To view load span tables please
go to page 13
HOLLOw CORE COMPOSITE FLOORS uNIT PROFILES
1200 mm Nominal Width
250 to 275mm overall composite depth
comprising 200mm unit with 50 or 75mm structural topping
250 to 225mm overall composite depth
comprising 150mm unit with 50 or 75mm structural topping
300 to 325mm overall composite depth
comprising 250mm unit with 50 or 75mm structural topping
375mm overall composite depth
comprising 300mm unit with 75mm structural topping
335mm overall composite depth
comprising 260mm unit with 75mm structural topping
To view load span tables please
go to page 13
A SuSTAINAbLE PROCESS...
Bison precast floors are produced under sustainable
conditions at our flagship production plant at
Swadlincote, Derbyshire. The state of the art Hollow
Core plant is the most technically advanced and
sustainable of its kind in the world: all waste water from
the factory is recycled; the fully automated process
is energy efficient, taking only 12 hours; and the
manufacturing process maximizes efficiency, which
prevents material wastage.
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33
SECTION 03
34 Pb
HOuSING PRODuCTS MuLTIPLE OCCuPANCY
FOR EXTENSIVE TECHNICAL DETAILS PLEASE VISIT OuR wEbSITE: www.bison.co.uk
HOLLOw CORE FLOORS bEARING DETAILS
25 mm clearance is required to allow unit to be dropped
into position past the flange of the supporting U.B.
25 mm
clearance
bEARINGS ON SHELF ANGLES
Structural concrete infill
Nominal bearing 75
Minimum bearing 50
Projection of angle
beyond extremity of
flange 50 mm.
Greater where U.C.
sections are used
Finishes
The recommendations for bearings of precast units are set out in Clause 5.2.3 of B.S. 8110:1997. These vary according to the type
of floor construction and the type of support material and building tolerances. In general, nominal bearings of 100mm on masonry
or 75mm on steelwork are recommended but may be reduced dependent upon circumstances and subject to the above clause.
HOLLOw CORE FLOORS bEARING DETAILS
SIDE bEARING
bEARINGS ON MASONRY
Finishes
Nominal bearing
t / 2 - 10 mm
Wall thickness
t 190
t
Where required by Building Regulations for
sound insulation.
Continuous wet mortar by
builder to take up camber
Finishes
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SECTION 03
36
HOuSING PRODuCTS MuLTIPLE OCCuPANCY
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HOLLOw CORE FLOORS bEARING DETAILS
NARROw bEARING ON STEELwORK
Finishes
Nominal bearing
t / 2 - 10 mm
Wall thickness
t 150
(Min. 140 mm) t
Tie reinforcement at
400 c/c in joints and
troughs provided in
1200 wide units
Structural concrete infill
NARROw wALL bEARING
Finishes
Nominal bearingt / 2 - 10 mm(Min. 65 mm)
Wall thicknesst < 190(Min. 140 mm)
t
Tie reinforcement at
400 c/c in joints and
troughs provided in
1200 wide units
Structural concrete infill
N.B. In order to satisfy the tolerances in this situation, this
detail is only recommended where a full bearing is available
at the other end of the slab.
HOLLOw CORE FLOORS bEARING DETAILS
END SLOTS IN uNITS
TRIMMING OPENINGS
Slots may be provided in slab ends for the purpose of tying into the
structure for nominal continuity or disproportionate collapse
M.S.Trimmer. Fire protection, where necessary by
General Contractor.
Finishes
Structural concrete infillFinishes
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SECTION 03
HOuSING PRODuCTS MuLTIPLE OCCuPANCY
38
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1200mm Nominal Width
SOLID COMPOSITE FLOORS uNIT PROFILES
Solid composite construction utilises the advantages of a prestressed precast element acting compositely with an in-situ structural
topping, combining the benefits of precast and in-situ construction.
75mm unit with 50, 75, 100 or 125mm composite material
100mm unit with 50, 100, 150 or 200mm composite material
To view load span tables please
go to page 21
These benefits are:
• Reduced Construction Depths
• Speed of Erection
• Elimination of Shuttering
• Minimal Propping
• Fire Resistance
• Flexibility of Architectural
and Engineering design
A SuSTAINAbLE FuTuRE...
The inherent thermal mass properties of concrete can help to regulate temperature fluctuations, ensuring that
indoor environments are comfortable without the use of air conditioning, providing the user with a significant cost
and energy saving. Compared to air conditioning, the active Fabric Energy Storage (FES) of concrete reduces
carbon dioxide emissions by up to 50%.
SIMPLE bEARING ON TOP FLANGE OF STEELwORK
SLAb COMPOSITE wITH SuPPORTING bEAM
40 mm
Min. bearing
Nominal support reinforcement and/or daywork joints
determined by general layout and site operation.
40 mm
Min. bearing
Flange reinforcement and shear studs as
required by steelwork design
40 mm
Min. bearing
SOLID COMPOSITE FLOORS bEARING DETAILS
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39
SECTION 03
COMPOSITE STEEL bEAM DESIGN
40
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Composite steel beam design incorporating Hollow Core or solid slabs provides a structural and cost efficient solution for steel
frames. It reduces total tonnage of steel beams by up to 40% and also reduces the number of components to be erected.
DEFINITIONComposite steel beam design is the use of Hollow Core or solid slabs together with in-situ infill in conjunction with welded studs
onto steel beams. This enables the slabs and beams to act compositely together, enhancing the load capacity of the steel beams.
1. SHEAR STuD CAPACITY
DESIGN CONSIDERATIONS
2. EFFECTIVE wIDTH OF COMPRESSION AREA
PRD = 0.8 fu (d2/4) / gv
or
PRD = 0.29 aßd2 fcpEcp / gv
Whichever is the lesser.
a = 0.2 ( h/d+1) h = height of the stud.
d = is the diameter of the shank of the stud.
fu = is the specified ultimate tensile strength of the material of the stud but not greater than 500 N/mm2.
ß = a factor which takes into account the gap width g (mm) and is given as 0.5 (g/70+1) ² 1.0 and g ³ 30mm.
= a factor which takes into account the diameter ø of transverse high tensile tie steel (grade 460) and is given by 0.5 (ø / 20+1) ² 1.0 and ø ³ 8mm.
= transverse joint factor = 0.5 (w / 600+1), w = width of hollow core unit.
fcp = average concrete cylinder strength = 0.8 x average cube strength of the in-situ and precast concrete.
Ecp = average value of elastic modulus of the insitu and precast concrete.
gv = partial safety factor for shear stud.
ø16
fy460
300s
*1000+2.5g40fcu
-0.33
Beff =
ø = transverse reinforcement diameter
fcu = concrete strength
s = bar spacing
fy = reinforcement strength
g = gap
ø16
fy460
300s
*1000+2.5g40fcu
-0.33
DESIGN CONSIDERATIONS
Beff
Rc = 0.45 x fcu;
beff x D slab
Py
Py
P. N. A.
P. N. A.
Steel Beam
Transverse Reinforcement
D slab
D
Hollow Core SlabShear StudInsitu Concrete
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SECTION 04
buILDING REGuLATIONS
42
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PART A MASONRY buILDINGSCONSTRuCTION SOLuTIONS
The Building Regulations Part A December 2004 introduced a system of classification of buildings to reflect the risk of disproportionate
collapse probabilities. The following solutions give guidance as to the details required for each of the main frame options related to
Hollow Core slabs.
claSS 1 anD 2a BuilDingS
Flats, apartments and other residential buildings not exceeding 4 storeys. Provision of effective anchorage to satisfy Building
Regulations from ‘building in’ of Hollow Core units.
claSS 2B BuilDingS (Horizontal Ties only + notional removal)
Flats, apartments and other residential buildings greater than 4 storeys but not exceeding 15 storeys. All design and details for
horizontal tying in accordance with BS5628 Part 1 and BS8110 Part 1.
EXTERNAL LOAD bEARING CAVITY wALL DETAIL
EXTERNAL NON-LOAD bEARING CAVITY wALL DETAIL
140 mm
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centreswith 10 mm dia.
‘U’ bar per socket
In-situ
concrete stitch
Bison precast
concrete Hollow
Core slab
Continuous wet
mortar, by builder,
to take up camber
Reinforcement to suit
Structural Engineer’s
design
100 mm min.
Solid block wall
Bison precast
concrete Hollow
Core slab unitContinuous wet
mortar, by builder,
to take up camber
140 mm
Bison precast concrete
Hollow Core slab unit
with perforated troughs
for tying requirements
In-situ
concrete stitch
Reinforcement to suit
Structural Engineer’s
design
10 mm dia. high yield
‘U’ bar per trough
100 mm min.
Solid block wall
Bison precast
concrete Hollow
Core slab unit
140 mm
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centreswith 10 mm dia.
‘U’ bar per socket
In-situ
concrete stitch
Bison precast
concrete Hollow
Core slab
Continuous wet
mortar, by builder,
to take up camber
Reinforcement to suit
Structural Engineer’s
design
100 mm min.
Solid block wall
Bison precast
concrete Hollow
Core slab unitContinuous wet
mortar, by builder,
to take up camber
140 mm
Bison precast concrete
Hollow Core slab unit
with perforated troughs
for tying requirements
In-situ
concrete stitch
Reinforcement to suit
Structural Engineer’s
design
10 mm dia. high yield
‘U’ bar per trough
100 mm min.
Solid block wall
Bison precast
concrete Hollow
Core slab unit
DETAILS FOR TYPE 1 & 2A
PART A MASONRY buILDINGSCONSTRuCTION SOLuTIONS
claSS 2B BuilDingS (Horizontal and vertical Ties)
Flats, apartments and other residential buildings greater than 4 storeys but not exceeding 15 storeys. All design and details
for horizontal and vertical tying in accordance with BS5628 Part 1and BS8110 Part 1 for Class 2B and Class 3 Buildings.
claSS 3 BuilDingS (Horizontal and vertical Ties + risk assessment)
All buildings defined above as Class 2A and 2B that exceed the limits on area and/or number of storeys.
All design and details for horizontal and vertical tying in accordance with BS5628 Part 1and BS8110 Part 1 for
Class 2B and Class 3 Buildings.
EXTERNAL LOAD bEARING CAVITY wALL DETAIL
EXTERNAL NON-LOAD bEARING CAVITY wALL DETAIL
140 mm
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centreswith 10 mm dia.
‘U’ bar per socket
In-situ
concrete stitch
Bison precast
concrete Hollow
Core slab
Continuous wet
mortar, by builder,
to take up camber
Reinforcement to suit
Structural Engineer’s
design
100 mm min.
Solid block wall
Bison precast
concrete Hollow
Core slab unitContinuous wet
mortar, by builder,
to take up camber
140 mm
Bison precast concrete
Hollow Core slab unit
with perforated troughs
for tying requirements
In-situ
concrete stitch
Reinforcement to suit
Structural Engineer’s
design
10 mm dia. high yield
‘U’ bar per trough
100 mm min.
Solid block wall
Bison precast
concrete Hollow
Core slab unit
140 mm
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centreswith 10 mm dia.
‘U’ bar per socket
In-situ
concrete stitch
Bison precast
concrete Hollow
Core slab
Continuous wet
mortar, by builder,
to take up camber
Reinforcement to suit
Structural Engineer’s
design
100 mm min.
Solid block wall
Bison precast
concrete Hollow
Core slab unitContinuous wet
mortar, by builder,
to take up camber
140 mm
Bison precast concrete
Hollow Core slab unit
with perforated troughs
for tying requirements
In-situ
concrete stitch
Reinforcement to suit
Structural Engineer’s
design
10 mm dia. high yield
‘U’ bar per trough
100 mm min.
Solid block wall
Bison precast
concrete Hollow
Core slab unit
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SECTION 05
buILDING REGuLATIONS
44
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PART A CONCRETE FRAMED buILDINGSCONSTRuCTION SOLuTIONS
claSS 2B BuilDingS (Horizontal and vertical Ties)
Flats, apartments and other residential buildings greater than 4 storeys but not exceeding 15 storeys.
claSS 3 BuilDingS + (risk assessment)
All buildings defined above as Class 2A and 2B that exceed the limits on area and/or number of storeys. All design and details for
horizontal and vertical tying in accordance with BS8810 Part 1 for Class 2B and Class 3 Buildings.
TYPICAL SECTION INTERNAL wALL (LOAD bEARING)
TYPICAL SECTION EXTERNAL wALL (LOAD bEARING)
Grout joint
175 mm 150 mm
Reinforcement to suit
Structural Engineer’s
designIn-situ
concrete infill
Bison precast concrete
Hollow Core slab
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centre swith 10 mm dia.
‘U’ bar per socket
Grout joint
In-situ
concrete infill
Wire loop
connections
Bison precast concrete
Hollow Core slab
Grout joint
175 mm
Reinforcement to suit
Structural Engineer’s
designIn-situ
concrete infill
Bison precast concrete
Hollow Core slab
10 mm dia.
‘U’ bar in troughts
150 mm
Reinforcement to suit
Structural Engineer’s
design
Grout joint
In-situ
concrete infill
Wire loop
connections
Bison precast concrete
Hollow Core slab
Reinforcement to suit
Structural Engineer’s
design
10 mm dia.
‘U’ bar in
troughts
Grout joint
175 mm 150 mm
Reinforcement to suit
Structural Engineer’s
designIn-situ
concrete infill
Bison precast concrete
Hollow Core slab
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centre swith 10 mm dia.
‘U’ bar per socket
Grout joint
In-situ
concrete infill
Wire loop
connections
Bison precast concrete
Hollow Core slab
Grout joint
175 mm
Reinforcement to suit
Structural Engineer’s
designIn-situ
concrete infill
Bison precast concrete
Hollow Core slab
10 mm dia.
‘U’ bar in troughts
150 mm
Reinforcement to suit
Structural Engineer’s
design
Grout joint
In-situ
concrete infill
Wire loop
connections
Bison precast concrete
Hollow Core slab
Reinforcement to suit
Structural Engineer’s
design
10 mm dia.
‘U’ bar in
troughts
PART A CONCRETE FRAMED buILDINGSCONSTRuCTION SOLuTIONS
TYPICAL SECTION INTERNAL wALL (NON-LOAD bEARING)
TYPICAL SECTION EXTERNAL wALL (NON-LOAD bEARING)
Grout joint
175 mm 150 mm
Reinforcement to suit
Structural Engineer’s
designIn-situ
concrete infill
Bison precast concrete
Hollow Core slab
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centre swith 10 mm dia.
‘U’ bar per socket
Grout joint
In-situ
concrete infill
Wire loop
connections
Bison precast concrete
Hollow Core slab
Grout joint
175 mm
Reinforcement to suit
Structural Engineer’s
designIn-situ
concrete infill
Bison precast concrete
Hollow Core slab
10 mm dia.
‘U’ bar in troughts
150 mm
Reinforcement to suit
Structural Engineer’s
design
Grout joint
In-situ
concrete infill
Wire loop
connections
Bison precast concrete
Hollow Core slab
Reinforcement to suit
Structural Engineer’s
design
10 mm dia.
‘U’ bar in
troughts
Grout joint
175 mm 150 mm
Reinforcement to suit
Structural Engineer’s
designIn-situ
concrete infill
Bison precast concrete
Hollow Core slab
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centre swith 10 mm dia.
‘U’ bar per socket
Grout joint
In-situ
concrete infill
Wire loop
connections
Bison precast concrete
Hollow Core slab
Grout joint
175 mm
Reinforcement to suit
Structural Engineer’s
designIn-situ
concrete infill
Bison precast concrete
Hollow Core slab
10 mm dia.
‘U’ bar in troughts
150 mm
Reinforcement to suit
Structural Engineer’s
design
Grout joint
In-situ
concrete infill
Wire loop
connections
Bison precast concrete
Hollow Core slab
Reinforcement to suit
Structural Engineer’s
design
10 mm dia.
‘U’ bar in
troughts
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45
SECTION 05
buILDING REGuLATIONS
46
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PART A STEEL FRAMED buILDINGSCONSTRuCTION SOLuTIONS
claSS 1 anD 2a BuilDingS
Apartments and other residential buildings not exceeding 4 storeys. This type of building uses the friction and built-in
details to achieve tying requirements.
TYPICAL SECTION EXTERNAL STEELwORK DETAILS
Continuous wet mortar
by Builder, to take up
camber
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
In-situ
concrete stitch
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
Bison precast concrete
Hollow Core slab units
with preformed troughs
for tying requirements
In-situ concrete stitch
In-situ concrete stitch
Shear stud
Bison precast
concrete Hollow
Core slab unit
Reinforcement to suit
Structural Engineer’s
design
Reinforcement to suit
Structural Engineer’s
design welded to top
flange of steel beam at
trough bottom
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centreswith 10 mm dia.
‘U’ bar per socket
Continuous wet
mortar, by Builder,
to take up camber
In-situ concrete stitch
Continuous wet mortar
by Builder, to take up
camber
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
In-situ
concrete stitch
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
Bison precast concrete
Hollow Core slab units
with preformed troughs
for tying requirements
In-situ concrete stitch
In-situ concrete stitch
Shear stud
Bison precast
concrete Hollow
Core slab unit
Reinforcement to suit
Structural Engineer’s
design
Reinforcement to suit
Structural Engineer’s
design welded to top
flange of steel beam at
trough bottom
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centreswith 10 mm dia.
‘U’ bar per socket
Continuous wet
mortar, by Builder,
to take up camber
In-situ concrete stitch
Continuous wet mortar
by Builder, to take up
camber
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
In-situ
concrete stitch
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
Bison precast concrete
Hollow Core slab units
with preformed troughs
for tying requirements
In-situ concrete stitch
In-situ concrete stitch
Shear stud
Bison precast
concrete Hollow
Core slab unit
Reinforcement to suit
Structural Engineer’s
design
Reinforcement to suit
Structural Engineer’s
design welded to top
flange of steel beam at
trough bottom
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centreswith 10 mm dia.
‘U’ bar per socket
Continuous wet
mortar, by Builder,
to take up camber
In-situ concrete stitch
claSS 2B BuilDingS (Horizontal and vertical Ties)
Flats, apartments and other residential buildings greater than 4 storeys but not exceeding 15 storeys.
claSS 3 BuilDingS (Horizontal and vertical Ties + risk assessment)
All buildings defined above as Class 2A and 2B that exceed the limits on area and/or number of storeys.
These types of buildings require horizontal and vertical ties which are provided by the steel frame. Additionally the floors
must be tied to the steelwork at the perimeter and to each other for internal supports. Additional internal tying of the floor to
the steelwork is required where the frame is used for bracing.
TYPICAL SECTION EXTERNAL STEELwORK DETAILS
PART A STEEL FRAMED buILDINGSCONSTRuCTION SOLuTIONS Continuous wet mortar
by Builder, to take up
camber
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
In-situ
concrete stitch
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
Bison precast concrete
Hollow Core slab units
with preformed troughs
for tying requirements
In-situ concrete stitch
In-situ concrete stitch
Shear stud
Bison precast
concrete Hollow
Core slab unit
Reinforcement to suit
Structural Engineer’s
design
Reinforcement to suit
Structural Engineer’s
design welded to top
flange of steel beam at
trough bottom
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centreswith 10 mm dia.
‘U’ bar per socket
Continuous wet
mortar, by Builder,
to take up camber
In-situ concrete stitch
Continuous wet mortar
by Builder, to take up
camber
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
In-situ
concrete stitch
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
Bison precast concrete
Hollow Core slab units
with preformed troughs
for tying requirements
In-situ concrete stitch
In-situ concrete stitch
Shear stud
Bison precast
concrete Hollow
Core slab unit
Reinforcement to suit
Structural Engineer’s
design
Reinforcement to suit
Structural Engineer’s
design welded to top
flange of steel beam at
trough bottom
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centreswith 10 mm dia.
‘U’ bar per socket
Continuous wet
mortar, by Builder,
to take up camber
In-situ concrete stitch
Continuous wet mortar
by Builder, to take up
camber
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
In-situ
concrete stitch
Bison precast
concrete Hollow
Core slab unit
Bison precast
concrete Hollow
Core slab unit
Bison precast concrete
Hollow Core slab units
with preformed troughs
for tying requirements
In-situ concrete stitch
In-situ concrete stitch
Shear stud
Bison precast
concrete Hollow
Core slab unit
Reinforcement to suit
Structural Engineer’s
design
Reinforcement to suit
Structural Engineer’s
design welded to top
flange of steel beam at
trough bottom
150 mm wide perforated
pocket along the edge
of slab unit at 1200 mm
centreswith 10 mm dia.
‘U’ bar per socket
Continuous wet
mortar, by Builder,
to take up camber
In-situ concrete stitch
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
47
SECTION 05
buILDING REGuLATIONS
48
FOR EXTENSIVE TECHNICAL DETAILS PLEASE VISIT OuR wEbSITE: www.bison.co.uk
PART ECONSTRuCTION SOLuTIONS
The Building Regulations Part E:2003 and the subsequent amendment May 2004 give guidance to the requirements for the
resistance to the passage of sound. For new build attached dwellings, two approaches may be made. Part E allows the developer
to choose between Pre Completion Testing (PCT) or, if available, a Robust Detail (RD) may be used by registering plots with Robust
Details Ltd. The Pre Completion Testing (PCT) and the Robust Detail (RD) requirements are given below.
building Regulations Approved Document Part E
airborne sound: new Build change of use
Walls min 45dB min 43dB
Floors min 45 dB min 43dB termed DnT,w +Ctr
impact sound:
Floors max 62 dB max 64 dB termed LnT,w
Robust Detail requirements (new build attached dwellings only)
airborne sound: min/max mean
Walls min 47dB min 50dB
Floors min 47 dB termed DnT,w +Ctr
impact sound:
Floors max 60 dB max 57 dB termed LnT,w
TYPICAL SOuND ATTENuATION DETAIL
275mm min.
100 75 100
200mm
100mm min.
Yelofon E-strip acoustic edge strip
65mm thick sand/cement screed or
40mm thick proprietary screed,
nominal 80kg/m2 mass per unit area
10mm Yelofon HD10+
Min. 100mm thick blockwork
medium density (1350-1600kg/m3)
Nominal 8mm thick parge coat
Flexible cavity closer
200mm deep Bison Hollow Core
slab units (300kg/m2)
Gypsum-based board (nominal
8kg/m2) mounted on dabs on
cement/sand render (nominal
8mm) with scratch finish
PART ECONSTRuCTION SOLuTIONS
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
49
SECTION 05
50
buILDING REGuLATIONS
FOR EXTENSIVE TECHNICAL DETAILS PLEASE VISIT OuR wEbSITE: www.bison.co.uk
PART E MASONRY buILDINGSCONSTRuCTION SOLuTIONS
RObuST DETAILS SEPARATING FLOOR - CONCRETE E-FC-1
RObuST DETAILS SEPARATING FLOOR - CONCRETE E-FC-4
1 2 3 4
1 2 3 4
prEcaST concrETE HolloW corE floor SlaB, ScrEED
1. floaTing floor See section 4 (Robust Details Handbook) for suitable floating floor treatment.
2. ScrEED 40mm (min) screed directly applied to Hollow Core floor slabs - sand/cement or proprietary screed nominal 80 kg/m2 mass per unit area, see Appendix A (Robust Details Handbook).
3. STrucTural floor 150mm (min) precast concrete Hollow Core floor slab - 300kg/m2 mass per unit area.
4. cEiling See section 3 (Robust Details Handbook) for suitable ceiling treatment.
prEcaST concrETE HolloW corE floor SlaB, ScrEED laiD on iSoruBBEr rESiliEnT layEr
1. ScrEED 65mm (min) sand/cement screed, or 40mm (min) proprietary screed, nominal 80kg/m2 mass per unit area.
2. rESiliEnT layEr 6mm IsoRubber layer with IsoEdge flanking strip.
3. STrucTural floor 150mm (min) precast concrete Hollow Core floor slab - 300kg/m2 mass per unit area.
4. cEiling See section 3 (Robust Details Handbook) for suitable ceiling treatment which is dependent on floorplank depth and supporting wall density.
The requirements for a robust detail are taken from the
Robust Details Part E Handbook. The latest requirements
should always be sought from Robust Details Ltd.
PART E MASONRY buILDINGSCONSTRuCTION SOLuTIONS
RObuST DETAILS SEPARATING FLOOR - CONCRETE E-FC-5
1 2 3 4 prEcaST concrETE HolloW corE floor SlaB, ScrEED laiD on iSoruBBEr rESiliEnT layEr
1. ScrEED 65mm (min) sand/cement screed, or 40mm (min) proprietary screed, nominal 80kg/m2 mass per unit area.
2. rESiliEnT layEr YELOfon HD10+ with E-strip perimeter edging and J-strip tape for jointing.
3. STrucTural floor 150mm (min) precast concrete Hollow Core floor slab - 300kg/m2 mass per unit area.
4. cEiling See section 3 (Robust Details Handbook) for suitable ceiling treatment which is dependent on floorplank depth and supporting wall density.
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
51
SECTION 05
buILDING REGuLATIONS
52
FOR EXTENSIVE TECHNICAL DETAILS PLEASE VISIT OuR wEbSITE: www.bison.co.uk
PART E STEEL FRAMED buILDINGSCONSTRuCTION SOLuTIONS
TYPICAL DETAIL MASONRY wALLSINTERNAL SEPARATING FLOOR AND wALL
TYPICAL DETAIL STuD wALLSINTERNAL SEPARATING FLOOR AND wALL
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
335 mm min.
275 mm min.
10030min.
30min.
10074
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
102 30min.
100100
335 mm min.
275 mm min.
10030min.
30min.
10074
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
102 30min.
100100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
335 mm min.
275 mm min.
10030min.
30min.
10074
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
102 30min.
100100
335 mm min.
275 mm min.
10030min.
30min.
10074
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
102 30min.
100100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1 Yelofon E-strip acoustic edge strip (by Cellecta).
2 Minimum 40mm thick ‘Gyvlon’ Screed (by Lafarge).
3 Minimum 10mm Yelofon HD 10+ (by Cellecta).
4 Min. 12.5mm thick ‘Lafarge’ Gypsum based ceiling board (min. 8kg/m2) suspended from a proprietary support system.
5 Acoustic quilt (by Rockwool).
6 Soft joint.
7 Compressible filler board.
8 Proprietary sliding brick anchor system.
9 Min. 100mm thick blockwork (medium density) 1800 -2300g/m3.
10 Nominal 8mm thick parge coat (by Lafarge).
11 12.5mm thick Echeck wallboard (by Lafarge).
12 Skirting board.
13 Yelofon J-strip acoustic jointing tape (by Cellecta).
14 150 or 200mm min. deep ‘Bison Hollow Core floor units’ (300kg/m2).
15 Grouted void between P.C. units.
16 12.5mm thick Echeck wallboard (by Lafarge) encasement to steelwork. Restrained via proprietary framing system.
17 12.5mm thick Echeck wallboard (by Lafarge) tacken up to u/side of floor providing 1.0 hour fire protection to steelwork.
PART E STEEL FRAMED buILDINGSCONSTRuCTION SOLuTIONS
TYPICAL DETAIL MASONRY wALLSEXTERNAL wALL AND SEPARATING FLOOR
TYPICAL DETAIL MASONRY wALLSEXTERNAL wALL AND SEPARATING FLOOR
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
335 mm min.
275 mm min.
10030min.
30min.
10074
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.102 30
min.100100
335 mm min.
275 mm min.
10030min.
30min.
10074
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
102 30min.
100100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
335 mm min.
275 mm min.
10030min.
30min.
10074
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
102 30min.
100100
335 mm min.
275 mm min.
10030min.
30min.
10074
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
102 30min.
100100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1 Yelofon E-strip acoustic edge strip (by Cellecta).
2 Minimum 40mm thick ‘Gyvlon’ Screed (by Lafarge).
3 Yelofon J-strip acoustic jointing tape (by Cellecta).
4 Flexible cavity closer.
5 Acoustic quilt (by Rockwool).
6 Compressible filler board.
7 Soft joint.
8 External leaf.
9 Proprietary sliding brick anchor system.
10 Proprietary wall ties in accordance with approved document ‘E’ (2003), section 2.
11 Nominal 8mm thick parge coat (by Lafarge).
12 12.5mm thick Echeck wallboard (by Lafarge).
13 Skirting board.
14 Min. 10mm Yelofon HD10+ (by Cellecta).
15 Min. 12.5mm thick ‘Lafarge’ Gypsum based ceiling board (min. 8kg/m2) suspended from a proprietary support system.
16 150 or 200mm min. deep ‘Bison Hollow Core floor units’ (300kg/m2).
17 2 No. layers of Echeck wallboard (by Lafarge) encasement to steelwork. Restrained via proprietary framing system.
18 12.5mm thick Echeck wallboard (by Lafarge) taken up to u/side of floor providing 1.0 hour fire protection to steelwork.
19 Min. 100mm thick blockwork (medium density) 1800 -2300g/m3.
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
53
SECTION 05
buILDING REGuLATIONS
54
FOR EXTENSIVE TECHNICAL DETAILS PLEASE VISIT OuR wEbSITE: www.bison.co.uk
PART E STEEL FRAMED buILDINGSCONSTRuCTION SOLuTIONS
TYPICAL DETAIL STuD wALLSINTERNAL SEPARATING FLOOR AND wALL
TYPICAL DETAIL STuD wALLSINTERNAL wALL AND SEPARATING FLOOR
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
9
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
9
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
1 Yelofon E-strip acoustic edge strip (by Cellecta).
2 Minimum 40mm thick ‘Gyvlon’ Screed (by Lafarge).
3 Minimum 10mm Yelofon HD 10+ (by Cellecta).
4 10mm Aerofoil isolation layer.
5 Min. 12.5mm thick ‘Lafarge’ Gypsum based ceiling board (min. 8kg/m2) suspended from a proprietary support system.
6 Acoustic quilt.
7 Deflection Tolerance.
8 RSP 38 modified Lafarge stud system.
9 rSp 38 modified lafarge stud system studs. Two 50mm C studs at 600mm centres. facings. 2 layers Lafarge 15mm dBcheck wallboard both sides. insulation. 50mm glass mineral wool density 19.5 kg/m3.
10 Timber sole plate.
11 Yelofon J-strip acoustic jointing tape (by Cellecta).
12 150 or 200mm min. deep Bison Hollow Core floor units (300kg/m2).
13 Grouted void between P.C. units.
14 12.5mm thick Echeck wallboard (by Lafarge) encasement to steelwork. Restrained via proprietary framing system.
15 Deflection head detail.
PART E STEEL FRAMED buILDINGSCONSTRuCTION SOLuTIONS
TYPICAL DETAIL STuD wALLSEXTERNAL SEPARATING FLOOR AND wALL
TYPICAL DETAIL STuD wALLSEXTERNAL wALL AND SEPARATING FLOOR
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.9
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
9
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
1 Tyvek breather membrane 12.5 moisture resistant wallboard and 36mm polyfoam plus.
2 Yelofon E-strip acoustic edge strip (by Cellecta).
3 Yelofon J-strip acoustic jointing tape (by Cellecta).
4 Timber sole plate.
5 10mm Aerofoil isolation layer.
6 Flexible cavity closer.
7 Acoustic quilt (by Rockwool).
8 External cladding 102mm brick or 100mm block + 16mm render.
9 lafarge stud system studs. CS90/Y Lafarge C studs at 600mm centres. facings. 1 layer Lafarge 12.5mm firecheck wallboard on 1 layer 12.5mm vapourcheck wallboard. insulation. 90mm rockwool flex.
10 Skirting board.
11 Minimum 40mm thick ‘Gyvlon’ Screed (by Lafarge).
12 Minimum 10mm Yelofon HD 10+ (by Cellecta).
13 150 or 200mm min. deep Bison Hollow Core floor units (300kg/m2).
14 Min. 12.5mm thick ‘Lafarge’ Gypsum based ceiling board (min. 8kg/m2) suspended from a proprietary support system.
15 2No. layers of Echeck wallboard (by Lafarge) encasement to steelwork. Restrained via proprietary framing system.
16 Deflection tolerance.
17 Deflection head detail.
18 Lafarge stud system (see above).
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
55
SECTION 05
56
buILDING REGuLATIONS
FOR EXTENSIVE TECHNICAL DETAILS PLEASE VISIT OuR wEbSITE: www.bison.co.uk
PART E CONCRETE wALLSCONSTRuCTION SOLuTIONS
TYPICAL DETAIL SECTION A TYPICAL INTERNAL SEPARATING wALL
TYPICAL DETAIL SECTION A TYPICAL INTERNAL SEPARATING wALL
150 mm
150 mm 175 mm
175 mm
102
102
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
150 mm
150 mm 175 mm
175 mm
102
102
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
1 Yelofon E-strip acoustic edge strip (by Cellecta).
2 Minimum 40mm thick ‘Gyvlon’ Screed (by Lafarge).
3 Minimum 10mm Yelofon HD 10+ (by Cellecta).
4 Min. 12.5mm thick ‘Lafarge’ Gypsum based ceiling board (min. 8kg/m2) suspended from a proprietary support system.
5 Acoustic sealant.
6 175mm thick concrete wall.
7 3mm Plaster skim on 15mm Lafarge wallboard 12mm Metal furring channel on dabs 35mm cavity with 25mm mineral fibre.
8 Dry pack mortar.
9 Skirting board.
10 Yelofon J-strip acoustic jointing tape (by Cellecta).
11 150 or 200mm min. deep ‘Bison Hollow Core floor units (300kg/m2).
12 In-situ concrete infill.
13 3mm Plaster skim on 15mm Lafarge wallboard 12mm Metal furring channel on dabs 35mm cavity with 25mm mineral fibre.
150 mm
150 mm 175 mm
175 mm
102
102
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.150100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
150 mm
150 mm 175 mm
175 mm
102
102
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150100
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
150
Bis
on U
nits
200
Bis
on U
nits
150
min
.
100
min
.
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
PART E CONCRETE wALLSCONSTRuCTION SOLuTIONS
TYPICAL DETAIL SECTION THROuGH A TYPICAL EXTERNAL wALL
TYPICAL DETAIL SECTION THROuGH A TYPICAL EXTERNAL wALL
1 Yelofon E-strip acoustic edge strip (by Cellecta).
2 Yelofon J-strip acoustic jointing tape (by Cellecta).
3 Dry pack mortar.
4 Flexible cavity closer.
5 In-situ concrete infill.
6 150mm concrete wall.
7 3mm Plaster skim on 15mm Lafarge wallboard 12mm Metal furring channel on dabs 35mm cavity with 25mm mineral fibre.
8 3mm Plaster skim on 15mm Lafarge wallboard 12mm Metal furring channel on dabs 35mm cavity with 25mm mineral fibre.
9 Skirting board.
10 Minimum 40mm thick ‘Gyvlon’ Screed (by Lafarge).
11 Minimum 10mm Yelofon HD 10+ (by Cellecta).
12 150 or 200mm min. deep Bison Hollow Core floor units (300kg/m2).
13 Min. 12.5mm thick ‘Lafarge’ Gypsum based ceiling board (min. 8kg/m2) suspended from a proprietary support system.
14 Acoustic sealant.
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
57
SECTION 05
TECHNICAL SPECIFICATIONS & HEALTH AND SAFETY
58
FOR EXTENSIVE TECHNICAL DETAILS PLEASE VISIT OuR wEbSITE: www.bison.co.uk
Bison floors are manufactured by the long line prestressed method using slip form or extrusion techniques. The units are cast on heated steel beds within an enclosed factory environment.
The materials used in the manufacture of Bison floors comply with the relevant British Standard for that material.
An air entraining agent complying with BS EN 934-2-2001 is included in the concrete mix to improve workability.
Reinforcement is generally 5mm diameter high tensile wire or 12.5mm diameter strand complying with the requirements of B.S.5896:1980.
Bison units are sawn to length on the manufacturing bed and are supplied as standard with plain sawn ends with open cores.
Concrete surface finish to soffit is Type A finish as described in clause 6.2.7.3. of B.S.8110:1997.
The soffit is suitable for the direct application of a textured paint finish where this is applied in accordance with the manufacturers instructions.
Where a plaster finish is intended it may be necessary to use a bonding agent in accordance with the instructions of the plaster manufacturer. Plaster finishes are not recommended on longer spans.
Sides and top surfaces are ‘as extruded’ as described in Table 5.5 of B.S.8110:1997.
Units may accumulate water within the cores due to exposure during the construction programme. The General Contractor should drill weep holes as necessary, or keep them clear where they are provided during manufacture.
Bison units are manufactured in nominal sizes as follows :Standard nominal width of all units is 1200mm.Solid : Depth 75mm 100mmHollow : Depth 150mm 200mm 260mm 300mm 250mm 400mm 450mmCross-sectional tolerances are within the limits set out in clause 6.2.8.3. of B.S. 8110:1997. Length tolerances are ± 20 mm.
Bison units will have an upward camber due to pre-stressing as described in clause 6.2.8.4. of B.S.8110:1997.
Edges are shaped to form a grout joint giving a shear key to distribute load to adjacent units. Where non-standard widths are provided the edge will be rough cut from a standard unit.
bISON PRECAST FLOORINGSPECIFICATIONS
1.1
1.2
1.3
1.4
1.5
3.1
3.2
3.3
2.1
2.2 2.3 2.4
MANuFACTuRE
DIMENSIONS
FINISHES
bISON PRECAST FLOORINGSPECIFICATIONS
The design of Bison units is in accordance with the requirements and recommendations of B.S.8110:1997 “The Structural Use of Concrete.”
LOAD/SPAN CAPACITY : The reinforcement pattern within a Bison section will vary according to the design loading specified.
ExPOSURE CONDITION : The standard Bison section is suitable for a xCI exposure classification as defined in Table 3.2 of BS 8500:2002. Other exposure classes can be adopted subject to design approval from Bison Technical Department.
FIRE RESISTANCE : Fire resistance is based upon the tabulated data contained within B.S. 8110 Part 2 Section 4. Sections are available for fire periods of 1 hour or 2 hours, without the addition of further finishes.These periods of fire resistance may be further enhanced by the application of appropriate finishes.
SERVICEABILITY : The standard Bison section is designed to meet the criteria of Class 3 as set out in clause 4.1.3 of B.S.8110.1997 Designs to Class 1 and Class 2 are available if required.
SOUND INSULATION : The requirements of The Building Regulations are that a floor construction incorporating the use of precast concrete units should have a minimum mass which is dependent upon whether the finishes to the top surface are directly applied or are on a separating layer. The mass of Bison unit sections are given in the technical data and are net weights of standard hollow sections.
HORIzONTAL & VERTICAL TIES : Ties necessary to satisfy the requirements for accidental damage should be specified by the Engineer with responsibility for the design of the overall structure in accordance with the Code of Practice.
BEARINGS : Level and structurally adequate bearings for Bison precast units should be provided by other contractors. These should generally be 100 mm for masonry or 75 mm for concrete or steelwork, but may be reduced in accordance with clause 5.2.3 of B.S.8110:1997.
HOLES : Small holes up to 60 mm diameter may be drilled on site through the Hollow Cores, care being taken to avoid damage to the reinforced ribs. Larger holes may be cut subject to the design capacity of the slab.
GROUTING : Joints between units should be grouted with a 30 N/mm2 concrete using a 6 mm nominal aggregate size.
PROPPING : Where the slab design requires site propping, this should be carried out in strict accordance with the Bison drawings.
4.1
4.2 4.3
4.4
4.5 4.6
4.7
4.8 4.9 4.10
4.11
DESIGN
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
59
SECTION 06
TECHNICAL SPECIFICATIONS & HEALTH AND SAFETY
60
FOR EXTENSIVE TECHNICAL DETAILS PLEASE VISIT OuR wEbSITE: www.bison.co.uk
bISON PRECAST FLOORINGSPECIFICATIONS
bISON PRECAST FLOORINGHEALTH & SAFETY
QuALITY ASSuRANCE
Bison operates a Quality Management System which complies with the requirements of ISO 9001: 2000 for the following scope: design, manufacture and erection of ancillary cube products (including reinforced and normally reinforced concrete). Prestressed floor units are subject to end product testing. Prestressed and ancillary concrete is subject to full design approval, traceable to current codes of practise statutory/regulatory requirements.
All Bison U.K. factories have been assessed by the British Standards Institution (B.S.I.) and awarded Certificates of Assessed Capability under the scheme covering Quality Assurance for the manufacture of precast concrete floors.
As a customer, you can be sure that all aspects of our production, design detailing and quality control have been independently inspected and have achieved the high level of competence and quality required by the British Standards Institution.
The company maintains a policy of continuous development, and reserves the right to change specification and details without prior notice.
This information must be read in conjunction with:
• Health , Safety & Welfare Attendances (supply & erect only).
• C.O.S.H.H information sheet – Precast Elements.
• Unit weight table.
• Information sheet: Lifters & Chains, supplier hire or purchase.
• Technical Information Sheet, Handling & Fixing Instructions for:
Sheet No. TI/304/10 Hollow Core
Sheet No. TI/304/11 Solid Composite Precast Elements
Sheet No. TI/304/12 Prestressed Housebeam & Deepbeam
Sheet No. TI/304/13 Bison Precast Stairs & Landings
Sheet No. TI/304/15 Floor products with cast-in lifters
Sheet No. TI/304/16 Trailasafe®
The Bison website www.bison.co.uk contains detailed information and data sheets on all products. Alternatively call the Health & Safety Department at our Burton office Tel 01283 495000 .
FM 00011
bISON PRECAST FLOORINGHEALTH AND SAFETY
SAFETY DO’S & DON’TS
The do’s & don’ts listed below are by no means fully exhaustive-you should also refer to the current issue of the Precast Flooring Federation Code of Practice available on Tel 0116 253 6161.
• Do not alter the product without written permission from Bison Design Office, altering the product may compromise its structural integrity and lead to failure. This includes notching, hole forming, shortening, narrowing the unit etc.
• Do not alter the product in-situ, any permissible alterations must be completed on a flat stable platform. i.e. on the ground or floor area.
• Do not allow anyone to walk or work beneath the product whilst it is being hoisted or suspended.
• Do not work in areas without the appropriate perimeter edge protection, handrails, guardrails, platforms or stages.
• Do not access working areas without properly constructed, maintained, secured and illuminated, stairways, ramps, ladders or the like.
• Where lifting hooks are specified within a contract, do hoist the units by crane using ALL the lifting points in the top surface provided for that purpose. Prior to lifting safety chains must be loosely slung around the underside of the unit. The safety chains may only be released immediately before the slab is placed in its final position.
• For insurance purposes, Bison do not supply or hire lifters or chain sets. Please refer to our information sheets for details of supplier hire or purchase.
• Do not run plant or store equipment on the precast floor before it is grouted and cured. Once cured do not exceed the loads specified by the engineer.
• Do use a passive fall protection system wherever reasonably practicable considering all heights where the potential fall distance could result in an injury.
• Do ensure that perimeter edge scaffolding is positioned no more than 900mm below the bearing level particularly on masonry construction.
• Do ensure all voids created whilst placing units are adequately protected during and after erection.
• Do ensure all brickwork, blockwork or concrete is adequately cured, stable and fit to receive precast concrete units, and that steelwork is stable.
• Do ensure the stability of support beams, lintels etc. is considered, particularly the rotation of support member due to unequal loading.
• Do ensure you include allowance for site handling by referring to the unit weight table.
• Do ensure that all lifting equipment is supplied, used and inspected in accordance with current legislation.
• Do ensure all lifting operations are completed and in accordance with current legislation.
• Do wear adequate personal protective equipment (PPE) whilst handling or cutting concrete.
NOTE; Due to the principle constituents of cement, the liquid released whilst drilling drainage points etc is likely to have a caustic effect on the eyes and skin. For further information or to obtain the latest issue COSHH data sheet for cement call our Health & Safety Department at our Burton office Tel 01283 495000.
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
61
SECTION 06
RELATED PRODuCTS
62
FOR EXTENSIVE TECHNICAL DETAILS PLEASE VISIT OuR wEbSITE: www.bison.co.uk
bISON LIFTING HOOKSThis is a unique system from Bison, available with our Hollow Core flooring. The hooks are machine inserted during the production
process, for which Bison holds the European patent. The hooks enable faster, safer and more accurate erection. They also offer
cost savings by minimising damage to soffit and blockwork bearings.
DESIGN MANuFACTuRING
HEATED AND COOLED SLAbS
The system utilises low temperature water for heating and high
temperature water for cooling to condition a building, which
provides the opportunity to use renewable energy sources.
A sustainable alternative, which can significantly reduce
CO2 emissions over the life of the building.
Substantial savings in investment, maintenance and
operational costs, compared to conventional
air-conditioning systems.
The requirements for flexible space utilisation and variable
partitioning are easily met.
Clear benefits to occupants, no noise and no draughts,
producing a comfortable and productive environment.
Precast concrete elements are designed and constructed in
the factory with a velta PE-xa pipe matrix cast directly into the
precast slab or Hollow Core unit to offer a combined heating
and cooling solution.
This service covers the design, off-site manufacture and
installation of precast, pre-stressed Hollow Core flooring,
precast multi-storey wall panel structures and other bespoke
solutions with an in built heating and cooling capability.
CONSTRuCTIONOff-site production reduces construction programmes
and improves quality control.
Elimination of suspended ceilings can reduce building
height and lower construction costs.
Lifting hook being loaded into machine.
From transport to final position with ease and speed.
Bison and velta have joined forces to provide an innovative, sustainable and cost effective
floor heating and cooling system which is precast in to Bison flooring products.
Health and Safety is a major concern for Bison, and we have developed a range of methods and systems which help to
ensure that anyone using Bison products can do so with minimal risk to themselves or others.
HEALTH AND SAFETY PRODuCTS
TRAILASAFE®
Trailasafe® is designed to prevent or mitigate injuries
resulting from falls from trailer decks. Comprising
synthetic mesh suspended from a series of brackets
housing support arms, the system arrests the fall of
personnel, absorbing the energy of their descent and
ensuring their safety. Fully demountable, the system can
be stored within the vehicle or at the unloading point.
HOLE COVERSVoids such as service holes, formed in precast floor units
are trip hazards and have the potential to cause serious
injuries. Bison’s solution is the Hole Filler: a strong yet
slimlined product which is suitable for most holes.
The yellow, anti-slip cover is fully reusable and comes in
two sizes, 250mm or 350mm square. Each may be either
screwed down or fitted without the need for power tools,
by spreading the unit legs, locking it into position.
THE bISON AIR MATThe Bison Air Mat system has been tested by the BRE
and approved by the HSE. The Bison Air Mat system
comprises a series of interconnected and interlinked
mats available in a wide range of standard sizes. Using
a combination of modules they will accommodate
almost any floor area. Where the edges of an area to be
protected are open, or have large vertical voids that may
pose the hazard of “roll-off” fall to a lower area, special
parapet and corner mats can be provided.
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
63
SECTION 07
bISON ONLINE
64
FOR EXTENSIVE TECHNICAL DETAILS PLEASE VISIT OuR wEbSITE: www.bison.co.uk
For further information on Bison Precast Concrete Flooring and the full
range of Bison products and services, visit www.bison.co.uk or call the
Bison sales team on 01283 495000
www.bison.co.uk
HOLLOw CORE FLOORS
bEAM AND bLOCK FLOORS
LIFTING HOOKS
HOLLOw CORE COMPOSITE FLOORS
COMPOSITE STEEL bEAM DESIGN
TRAILASAFE®
SOLIDCOMPOSITE FLOORS
HOLLOw COREINSuLATED FLOORS
AIR MATS
FLOORS
FRAMES
HEALTH AND SAFETY
STADIA STAIRS
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
65
SECTION 08
bISON NOTES
66
FOR EXTENSIVE TECHNICAL DETAILS PLEASE VISIT OuR wEbSITE: www.bison.co.uk
FOR FuRTHER HELP AND INFORMATION PLEASE CALL OuR TECHNICAL HELP LINE: 01283 495334
67
SECTION 09
bISON CONCRETE
PRODuCTS Ltd
Millennium Court,First Avenue, Centrum 100,Burton-Upon-Trent DE14 2WR
Telephone: 01283 495000Facsimile: 01283 544900
Email: [email protected]: www.bison.co.uk
OTHER bROCHuRES
AVAILAbLE
• Staircases
• Stadia Products
• Crosswalls
• Lattice Flooring
• Beam & Block Flooring
• Safety Systems
August 2007
Printed on 100% recyclable paper
using vegetable based inks
All dimensions and illustrations in this publication are intended for guidance only and shall not constitute a “sale by description”. All dimensions given are nominal and Bison Limited may modify and change the information, products and specifications from time to time for a variety of reasons without prior notice. The information printed in this publication at the time of going to print, to the best of our knowledge, is correct and is not intended to have any legal effect, whether by way of advice, representation or warranty (express or implied). We accept no liability whatsoever (to the extent permitted by law) if you place any reliance on this guide you must do so at your own risk.
All rights reserved. Copyright in this publication belongs to Bison and all such copyright may not be used, sold, copied or reproduced, in whole or part, in any manner or in any media to any person without prior written consent.